Back for brake-shoes.



UNTTED STATES PATENT oEEioE.

JAMES S. THOMPSON, OF PELHAM, NEW YORK, ASSIGNOR TO AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF MAHWAH, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BACK FOR BRAKE-SHOES.

To all 'whom it may concern:

Be it known that I, JAMES S. THOMPSON, a citizen of the United States, and a resident of Pelham, in the county of West-- chester and State of New York, have made and invented certain new and useful Improvements in Backs for Brake-Shoes, of which the following is a specication.

My invention relates to brake shoes designed for use upon railway vehicles, and particularly to that type or kind of brake shoe commonly known and referred to as an interlocking shoe, and in which no waste material or scrap7 results when the shoe is in use, this result being attained by providing a shoe in which a partially wornout shoe or section is placed in front of and Vsecured to the wearing face of an unworn shoe or section, and the two then used as a unitary shoe, whereupon and as the combined shoe thus produced is used, the partially worn shoe will be completely worn away. Thereafter, and when the unworn shoe above referred to shall have been partially worn away, it is removed from its support and in turn placed in front of and Secured to another unworn shoe and completely worn away, and so on indefinitely.

The objects of my invention are to provide a brake shoe of the type above referred to which shall be simple in construction and in which the worn and unworn sections, which collectively form the body portion of the shoe, may be more readily assembled, and more securely held together, than has heretofore commonly been the case; t0 provide a brake shoe in which a back of a tough and strong material, Such as wrought iron or steel, is employed to support the body por tion or frictional member of the shoe, which,

vbeing commonly made of cast iron, is not well adapted to withstand the strains set up between the shoe and brake head, or other element whereby the shoe is supported; to provide a brake shoe in which the back may be used repeatedly to support the bodyl portions to be worn away in succession as above explained; and to otherwlse improve upon and increase the eliiciency of brake shoes of the type above referred to.

Vith the above and other objects in view, my invention consists in the improved brake shoe and back therefor described in the following specification, and specifically claimed in the concluding claims, and in such varia- Speeeaton of Letters Patent.

Application led September 5, 1913.

Patented May 5, 1914. SeriaI No. 788,229.

tions and modifications thereof as will be obvious to those skilled in the art to which my invention relates.

In the drawings accompanying and forming a part of` this application and wherein the preferred embodiment of my invention is illustrated: Figure l is a view sho-wing my improved brake shoe back in perspective; Figs. 2 and 3 are views showing the two parts or sections of the same in side elevation; Fig. 4: is a view taken upon a tions so formed that two series or sets ofk sections may be arranged one in front of the other, or superposed one upon the other, and securely fastened together to thereby form a unitary shoe body, from which it follows that the front sections will be first worn away when the shoe is in use, after which the rear sections will be worn away to as great an extent as is deemed desirable and then removed from the back of the shoe and subsequently placed in front of other unworn sections to be in turn entirely worn away. Thus, referring to the drawing wherein the body portion of the shoe is shown as made up of a plurality of sections 7, each extending transversely to the shoe, and particularly to Figs. 4 and 5, the lower sections 7 are sections which have been partly worn out in service, while the upper sections 7 are unworn sections. As the shoe is used the lower sections will be worn entirely out, and the upper sections `worn as thin as may be deemed desirable, after which Vthey will be removedfrom the back and placed in front of other unworn sections to be in turn completely worn away, there being no waste body material, or scrap produced in the useY of the Shoe.

The means whereby the superposed secf tions may be held together when the shoe is in use are shown as comprising lugs 8 upon the rear facesvor backs of the sections, and

recesses 9 corresponding in form and size with said lugs formed in the front faces ot the sections, so that the lugs ot the front sections may enter the recesses of the rear sections as illustrated in Figs. et and 5. The lugs and recesses are preferably tapering, are provided with undercut or beveled sides in order to secure a wedging action when the sections are assembled, and are commonly of considerable length longitudinally of the shoe in order to provide an extensive bearing and secure a strong connection between the sections. rIhe wider and open ends of the lugs and recesses above referred to lie at the middle of the assembled shoe in order that the sections may not become separated from one another when the shoe is in use, as will be understood.

The body portion o1 my improved brake shoe is supported from, and the sections thereof held together by the improved brake shoe back, the same comprising two sections 10, 11, located one at each end of the shoe; these sections have each two sides 12 and 13 spaced apart to pro-vide an intervening opening corresponding in form with the lugs 8 and within which opening the lugs of the rear sections lie when the shoe is assembled, whereby the body of the shoe is securely fastened to the back and a strong connection extending along substantially the entire length ot' the lugs is provided.

rlhe two back sections above referred to are made commonly from wrought iron or mild steel plate stock of it, to it in thickness, or thereabout, and are provided at their inner adjacent ends with means whereby the two sections may be detachably secured or locked to one another, so that the said sections, as well as the sections of the body portion of the shoe supported by them, will be prevented from moving apart.

1n the form of locking means illust-rated, the inner ends ot the sections are bent to provide upwardly extending loops 1st, 15, the loop 14 being somewhat larger than the loop 15 so as to overlie and partially inclose the same when the parts are assembled, as shown in Figs. 1 and a. rEhe loops are provided with holes as shown at 16 which register with o-ne another when the shoe is as* sembled, and through which a securing key 17 may extend to thereby fasten the shoe to a brake head or equivalent support. The construction referred to obviously provides a key lug of great strength as it is made up of two layers or thicknesses of the metal of the back sections of the shoe. f

The back sections are provided with end stops 18, and central lugs 19, at their free ends, in order that the shoe may be secured to the standard torni of brake head, as will be understood; the lugs and stops being Jformed, in the embodiment oit my invention illustrated, by providing a tongue at the ends of the sections and bending the ends of the sections upward and the tongue over toward the rear surface of the back, as will be understood from the drawings.

In the form of my invention illustrated each ot the two back sections is assembled with body sections sutlicient to form one half of the completed shoe, and the two portions thus produced united to ,torni a unitary shoe by causing the loops of the back to register and moving the two portions laterally to thereby bring the loops into locking engagement with one another, this lateral movement being incidental to the particular or specific form of means illustrated tor detachably locking the inner or adjacent ends of' the back sections together.

In use it will be understood that when the sections directly supported by the back have been worn as thin as is deemed desirable, the shoe will be removed from the brake head and the worn sections removed from the back and assembled with other un worn sections, the same back being used to form a new shoe in connection with unworn sections and the partially worn sections which were removed from it.

Having thus described and explained my invention., l claim and desire to secure by Letters Patent:

1. ln a brake shoe, a back comprising two sections located one at each end ora the shoe, the adjacent ends of which are provided with means whereby said sections may be detachably connected with one another; and a body portion comprising a plurality of sections detachably secured to said back.

2. 1n a brake shoe, a back comprising two sections located one at each end of the shoe, the adjacent ends of which sections interlock with one another and project from the rear face of the shoe to thereby provide a key lng; and a body portion comprising a plurality of sections detachably secured to said back. I

3. In a brake shoe, a back comprising two sections located one at each end of the shoe, the adjacent ends ot which are provided with. means whereby said sections may be detachably connected with one another; and a body portion comprisingI a plurality oit sections de- `achably securedvto said back, and a second plurality of sections detachably secured to said tirst-inentioned sections.

ln a brake shoe, a back comprising two sections located one at each end oit the shoe, the adjacent ends oit which sections inten lock with one another and project from the rear tace of the shoe to thereby provide a key lug; and a body portion comprising a plurality of sections detachably secured to said back; and a like number of sections detachablv secured to said first-mentioned sections.

ln a brake shoe, a back comprising two sections located one at each end of the shoe and the adjacent ends of which are provided with means whereby said sect-ions may be detachably connected with one another; and a body portion comprising a plurality of Sections extending transversely to the shoe and detachably secured to said back.

6. In a brake shoe, a back comprising two interlocking sections located one at each end of the shoe; and a body portion comprising a section extending transverse to the shoe and detachably secured to one of said back sections, and another section extending transverse to the shoe and detachably secured to the other of said back sections.

7. In a brake shoe, a back comprising two sections located one at each end of the shoe and the adjacent ends of .which sections interlock with one another; and a body portion comprising' two sections each of which extends transverse to the shoe and which sections are detachably secured one to each of said back sections.

8. In a brake shoe, a back comprising: two sections located one at each end of the shoe and the adjacent ends ot which sections interlock with one another and project from the rear face of the shoe to thereby provide a key lug; anda body portion comprising a plurality of sections extending transverse to the shoe and detachably secured-to said back.

9. In a brake slice, a back comprising two sections located one at each end of the shoe and the adjacent ends ot which are provided with means whereby said sections may be detachably connected with one another; a body portion comprising a plurality of sections extending transverse to the shoe and detachably secured to said back, and a second plurality of sections extending transverse to the shoe and detachablysecured to said first-mentioned sections.

10. In a brake shoe, a back comprising two sections located one at each end of the shoe and the adjacent ends of which sections interlock with one another; and a body portion comprising two sections each of which extends transverse to the shoe and which sections are detachably secured one to each of said back sections, and two other sections each of which extends transverse to the shoe and which second sections are secured one to cach of said first-mentioned sect-ions.

11. In a brake shoe, a back comprising two sections located one at each end ot the shoe, the adjacent ends of which interlock with one another and one ot which sections is provided with a projecting loop adapted to form a key lug; and a body portion comprising a plurality of sections detachably secured to said back.

12. In a brake shoe, a back comprising two sections located one at each end of the shoe, the adjacent ends of which interlock with one another and one of .which sections is provided with a projecting loop adapted to form a key lug; and a body portion comprising two sections extending transverse to the shoe and which sections are detachably secured one to each of said back sections.

13. In a brake shoe, a back comprising two sections located one at each end of the shoe, the adjacent ends ot which are provided each with a projecting loop, which loops are adapted to overlie one another to thereby provide a key lug; and a body portion comprising two sections extending transverse to the shoe and which sections are detachably secured one to each ot said back sections.

14. A back for a brake shoe comprising two sections having each a. projecting loop, which loops are adapted to overlie one another to thereby lock said sections together and provide a key lug.

15. A back for a brake shoe comprising two sections, each of which extends through a part only of the length ot the back and the adjacent ends of which sections are adapted to interlock with one another, and one of which sect-ions is provided with a projecting loop adapted to form a key lug.

16. A back tor a brake shoe comprising two sections, each of which extends through a part only of the length ofthe back and the adjacent ends ot which sections are adapted V9 to interlock with one another, and having a projecting .portion adapted to form a key lu 17. A back Jfor a brake shoe comprising two sections detachably connected with one another, and each of which sections extends throughout a part only of the length ot' the back.

18. A back for a brake shoe comprising two sections detachably connected with one another, the portions of said sections adjacent the connection between them being so shaped as to provide a projecting key lug.

19. In a brake shoe, a body portion comprising two sections each extending transverse to the shoe and each having an attaching lug upon its rear tace and a. recess cor responding in size and form with said lug upon its front tace; and a back comprising two sections located one at each end of the shoe and the adjacent ends of which interlock with one another, and which back sections are provided each with an opening, which openings are adapted to receive the attaching lugs aforesaid of said body sections.

20. In a brake shoe, a body portion comprising two sections each extending transverse to the shoe and each having an attaching lug upon its rear tace; and a back comprising two sections located one at eachl end of the shoe and the adjacent ends ofV which interlock with one another, and which back sections are provided each with an opening, which openings are adapted to receive the attaching lugs aforesaid of said body sections.

2l. In a. brake shoe, a body portion coinprising two sections each extending transverse to the shoe and each. having an attaching lug` upon its rear tace, and a recess corresponding` in size and forni with said lug upon its `front face; a back comprisingl two sections located one at each end of the shoe and the adjacent ends of which interlock with one another, and which back sections are provided each with an opening, which openings are adapted to receive the attaching lugs aforesaid ot said body sections; and a second body portion comprising a like number of similar body sections, the lugs upon the rear faces of which lie within the recesses aforesaid in the -tacos of said irstmentioned body sections.

ln a brake shoe` a body portion coinprising two sections each extending transverse to the shoe and each havinga longitudinally extending undercut attaching lug` upon its rear face; and a back comprising two sections located one at each end off the shoe and the adjacent ends oit which interlock7 and which back sections are provided each with an opening, which openings are adapted to receive the attaching lugs aforesaid oit said body sections.

3. In a brake shoe, a body portion conipulsingtwo sections each extending' transverse to the shoe and each having' a longitudinally extending undercut attaching lug upon its rear face and a recess corresponding in size and forni with said lug1 upon its front tace; and a back comprising two sections located one at each end of the shoe and the adjacent ends ot which interlock, and which back sections are provided each with an openinv', which openings are adapted to receive tie att-aching lugs aforesaid of said body sections.

24. ln a brake shoe, a body portion coinprising two sections each extending transverse to the shoe and each having` a longitudinally extending tapering` undercut attaching lug upon its rear face, the wider end or which lug lies adjacent the center of the shoe, and a recess corresponding in size and form with said lug,` upon its -front face; and a back con'iprising two sections located one at each end of the shoe and the adjacent ends of which interlock, and which back sections are provided each with an openino, which openings are adapted to receive the attaching lugs aforesaid of said body sections.

25. 1n a brake shoe, a body portion coniprising two sections each extending transverse to the shoe and each having` a longitudinally extending tapering undercut attaching lug upon its rear face, the wider end of which lug lies adjacent the center of the shoe; and a back comprising two sections located one at each end of the shoe and the adjacent ends of which interlock, and which back sections are provided each with an opening7 which openings are adapted to receive the attaching lugs aforesaid of said body sections.

Signed at New York borough of Manhattan in the county of New York and State of New York this 8rd day of Sept. A. D. 1913.

JAMES S. THQMPSON.

Wfitnesses U. D. THOMAS, STANLEY BAKER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

